왕겨 바이오차의 암모늄태 질소(NH4-N) 흡착 특성
Adsorption Characteristics of Aqueous Ammonium Using Rice hull-Derived Biochar
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초록
BACKGROUND: Objective of this study was to investigate adsorption characteristics of NH4-N to biochar produced from rice hull in respective to mitigation of greenhouse gases. METHODS AND RESULTS: NH4-N concentration was analyzed by UV spectrophotometer. For adsorption experiment of NH4-N to biochar, input amount of biochar was varied from 0.4 to 10 g/L with 30 mg/L NH4-N solution. Its adsorption characteristic was investigated with application of Langmuir isotherm. Adsorption amount and removal rates of NH4-N were decreased at 53.9% and increased at 20.2% with 10 g/L compared to 0.4 g/L, respectively. The sorption of NH4-N to biochar produced from rice hull was fitted well by a Langmuir model. The largest adsorption amount of NH4-N () and binding strength constant () were calculated as 0.4980 mg/g, and 0.0249 L/mg, respectively. It was observed that dimensionless constant ( ) was 0.58. CONCLUSION: It was indicated that biochar produced from rice hull is favorably absorbed NH4-N, because this value lie within 0<<1.
Abstract
BACKGROUND: Objective of this study was to investigate adsorption characteristics of NH4-N to biochar produced from rice hull in respective to mitigation of greenhouse gases. METHODS AND RESULTS: NH4-N concentration was analyzed by UV spectrophotometer. For adsorption experiment of NH4-N to biochar, input amount of biochar was varied from 0.4 to 10 g/L with 30 mg/L NH4-N solution. Its adsorption characteristic was investigated with application of Langmuir isotherm. Adsorption amount and removal rates of NH4-N were decreased at 53.9% and increased at 20.2% with 10 g/L compared to 0.4 g/L, respectively. The sorption of NH4-N to biochar produced from rice hull was fitted well by a Langmuir model. The largest adsorption amount of NH4-N () and binding strength constant () were calculated as 0.4980 mg/g, and 0.0249 L/mg, respectively. It was observed that dimensionless constant ( ) was 0.58. CONCLUSION: It was indicated that biochar produced from rice hull is favorably absorbed NH4-N, because this value lie within 0<<1.
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